02's

[bose]

I have owned a gn too many years to not know this answer but here goes.When shooting for good 02's at the track is the 780-790 supposed to be at the top end as you cross the line or the whole way down the track?Most of the time mine is 840 at launch and steadily decreases to the top end.Last night I was detuned to only run 12.7's because of a sick transmission and I was getting 843 at 60 foot and 778 to 782 at the line with no knock.Bruce

 

[Kevin Turch]

top end in 3rd gear. At least thats what i look for.

Kevin

 

[bruce]

Originally posted by bose
I have owned a gn too many years to not know this answer but here goes.When shooting for good 02's at the track is the 780-790 supposed to be at the top end as you cross the line or the whole way down the track?Most of the time mine is 840 at launch and steadily decreases to the top end.Last night I was detuned to only run 12.7's because of a sick transmission and I was getting 843 at 60 foot and 778 to 782 at the line with no knock.Bruce

You note what your car runs best at.
Tuning to get a particular O2 voltage is just urban legend. And probably started by someone selling headgaskets.
While slightly better then nothing, that's about all the good they are.

A WB makes alot more sense to use.

What folks just love to ignore is that the OEM O2s are backpressure sensitive, and EGT sensitive. So what might be perfect on one car, is wrong for another.